The R of the title stands for the young protagonist, Rune, fearlessly played by Pilou Asbæk. Imprisoned for violent assault, he’s a cocky, good-looking young man placed in the hardcore ward, where his survival depends on quickly learning the prison’s parallel world of rules, honour, and obligations.

R also stands for Rachid, a young Muslim prisoner who becomes Rune’s friend and accomplice, defying the rigid racial classes defined by the inmates.